[3.10] bpo-42972: Fully support GC for _winapi.Overlapped (GH-26381)

[miss-islington]

(cherry picked from commit 0fa282c)

Co-authored-by: Ken Jin 28750310+Fidget-Spinner@users.noreply.github.com

https://bugs.python.org/issue42972

[miss-islington]

@Fidget-Spinner and @vstinner: Status check is done, and it's a success ✅ .

[vstinner]

LGTM, good bot.

[miss-islington]

@Fidget-Spinner and @vstinner: Status check is done, and it's a success ❌ .

[Fidget-Spinner]

Errors:

2021-05-28T09:19:40.5802159Z 3 tests failed:
2021-05-28T09:19:40.5802633Z     test_asyncio test_httplib test_importlib

asyncio's logs, these tests are known to be flaky and reported somewhere on bpo:

2021-05-28T09:18:08.9401293Z FAIL: test_sendfile_close_peer_in_the_middle_of_receiving (test.test_asyncio.test_sendfile.ProactorEventLoopTests)
2021-05-28T09:18:08.9402357Z ----------------------------------------------------------------------
2021-05-28T09:18:08.9402931Z Traceback (most recent call last):
2021-05-28T09:18:08.9403749Z   File "D:\a\cpython\cpython\lib\test\test_asyncio\test_sendfile.py", line 457, in test_sendfile_close_peer_in_the_middle_of_receiving
2021-05-28T09:18:08.9405206Z     with self.assertRaises(ConnectionError):
2021-05-28T09:18:08.9405959Z AssertionError: ConnectionError not raised

test_importlib errors: I've never seen this one before

2021-05-28T09:16:08.2062616Z ======================================================================
2021-05-28T09:16:08.2063656Z FAIL: test_multiprocessing_pool_circular_import (test.test_importlib.test_threaded_import.ThreadedImportTests)
2021-05-28T09:16:08.2064777Z ----------------------------------------------------------------------
2021-05-28T09:16:08.2065427Z Traceback (most recent call last):
2021-05-28T09:16:08.2066366Z   File "D:\a\cpython\cpython\lib\test\test_importlib\test_threaded_import.py", line 258, in test_multiprocessing_pool_circular_import
2021-05-28T09:16:08.2067891Z     script_helper.assert_python_ok(fn)
2021-05-28T09:16:08.2068847Z   File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 160, in assert_python_ok
2021-05-28T09:16:08.2069688Z     return _assert_python(True, *args, **env_vars)
2021-05-28T09:16:08.2070645Z   File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 145, in _assert_python
2021-05-28T09:16:08.2071564Z     res.fail(cmd_line)
2021-05-28T09:16:08.2072242Z   File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 72, in fail
2021-05-28T09:16:08.2073008Z     raise AssertionError("Process return code is %d\n"
2021-05-28T09:16:08.2073741Z AssertionError: Process return code is 3221225477
2021-05-28T09:16:08.2075029Z command line: ['D:\\a\\cpython\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', 'D:\\a\\cpython\\cpython\\lib\\test\\test_importlib\\partial\\pool_in_threads.py']
2021-05-28T09:16:08.2075868Z 
2021-05-28T09:16:08.2076267Z stdout:
2021-05-28T09:16:08.2076663Z ---
2021-05-28T09:16:08.2076929Z 
2021-05-28T09:16:08.2077459Z ---
2021-05-28T09:16:08.2077744Z 
2021-05-28T09:16:08.2078110Z stderr:
2021-05-28T09:16:08.2078492Z ---
2021-05-28T09:16:08.2078789Z 
2021-05-28T09:16:08.2079162Z ---
2021-05-28T09:16:08.2079440Z 
2021-05-28T09:16:08.2080183Z ----------------------------------------------------------------------

httplib errors, this is already mentioned here https://bugs.python.org/issue44252:

2021-05-28T09:15:10.7551568Z Windows fatal exception: access violation
2021-05-28T09:15:10.7552292Z 0:03:29 load avg: 4.33 [231/427/1] test_httplib crashed (Exit code 3221225477)
2021-05-28T09:15:10.7575556Z 
2021-05-28T09:15:10.8138347Z Current thread 0x00001558 (most recent call first):
2021-05-28T09:15:10.8596401Z   File "D:\a\cpython\cpython\lib\ssl.py", line 1072 in _create
2021-05-28T09:15:10.8608169Z   File "D:\a\cpython\cpython\lib\ssl.py", line 518 in wrap_socket
2021-05-28T09:15:10.8616549Z   File "D:\a\cpython\cpython\lib\test\ssl_servers.py", line 37 in get_request
2021-05-28T09:15:10.8931572Z   File "D:\a\cpython\cpython\lib\socketserver.py", line 311 in _handle_request_noblock
2021-05-28T09:15:10.9022362Z   File "D:\a\cpython\cpython\lib\socketserver.py", line 237 in serve_forever
2021-05-28T09:15:10.9068369Z   File "D:\a\cpython\cpython\lib\test\ssl_servers.py", line 142 in run
2021-05-28T09:15:10.9087982Z   File "D:\a\cpython\cpython\lib\threading.py", line 1006 in _bootstrap_inner
2021-05-28T09:15:10.9127252Z   File "D:\a\cpython\cpython\lib\threading.py", line 963 in _bootstrap
2021-05-28T09:15:10.9768277Z 
2021-05-28T09:15:11.1399522Z Thread 0x0000058c (most recent call first):
2021-05-28T09:15:11.1537467Z   File "D:\a\cpython\cpython\lib\socket.py", line 496 in _real_close
2021-05-28T09:15:11.1876364Z   File "D:\a\cpython\cpython\lib\ssl.py", line 1330 in _real_close
2021-05-28T09:15:11.3695982Z   File "D:\a\cpython\cpython\lib\socket.py", line 502 in close
2021-05-28T09:15:11.3743399Z   File "D:\a\cpython\cpython\lib\ssl.py", line 1072 in _create

I have a feeling it's unrelated but I'm going to be cautious here - _winapi.Overlapped is used by asyncio on Windows so there's a chance. Gonna re-run the CI one more time. If it fails again then I'll start investigating.

[Fidget-Spinner]

Dang I forgot miss-islington auto deletes backports when I close them :(. Sorry I'll make it backport again.

[vstinner]

test_httplib crash is unrelated: https://bugs.python.org/issue44252

test_importlib: test_multiprocessing_pool_circular_import(): I wasn't aware of this crash, it sounds unrelated. Likely a random crash.

test_asyncio: test_sendfile_close_peer_in_the_middle_of_receiving(): it's also known and unrelated: https://bugs.python.org/issue41682